[issue30812] Running test_warnings twice fails

[STINNER Victor]

STINNER Victor added the comment:

Oh cool, my bisect tool identified the bug!

haypo at selma$ ./python -m test.bisect -o bisect test_warnings  test_warnings 
(...)
Tests (1):
* test.test_warnings._WarningsTests.test_showwarnmsg_missing
(...)
Bisection completed in 14 iterations and 0:00:14

So the bug is that test_showwarnmsg_missing() removes the warnings._showwarnmsg attribute, but don't restore it.

https://github.com/python/cpython/pull/2504 fixes the issue.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue30812>
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